


-- hello.lua
local M = {}

function M.calculate(a, b, operation)
    if operation == "add" then
        return a + b
    elseif operation == "subtract" then
        return a - b
    elseif operation == "multiply" then
        return a * b
    elseif operation == "divide" then
        return a / b
    else
        return "Unknown operation"
    end
end

return M